Combined look and latch



{No Model.; 2 SEEMS-Sheet 1.

E. M. 85 J. EJMIX. COMBINED LOCK AND LATGH. No. 521,984. Patented June 26, 1894.

3 I Inventors:

by %W M "zwmt fl iorney. mama. umoamwmwa COMPANY,

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(No model. 2 Sheets-Sheep ,2.

B. M. & J. E. MIX. COMBINED LOOK AND .LATGH.

No. 521.984. Patented June 26, 1394.

' Witness 8: Invent0rs: I

' UNITED STATES ATENT OFEIcEt- EUGENE M. MIX AND JAMES E. MIX, OF BUFFALO, NEW YORK, ASSIGNORS TO OLIVER F. SWIFT, OF SAME PLAoE.

COMBINED LOCK AND LATCH.

SPECIFICATION forming part of Letters Patent No. 521,984, dated June 26, 1894.

Application filed February 12, 1894. Serial No. 499,965- (No model.)

To all whom it may concern.-

Be it known that we, EUGENE M. MIX and JAMES E. MIX, citizens of the United States, residing at Buffalo, in the county of Erie and State of New York, have jointly invented certain new and useful Improvements in a Combined Lock and Latch; and we do hereby declare that the following description of our said invention, taken in connection with the accompanying sheet of drawings, forms a full clear, and exact specification.

This invention has general reference to improvements on a combined lock and latch; and it consists, essentially, in the novel and peculiar combination of parts and'details of construction, as hereinafter first fully set forth and described and then pointed out in the claims.

In the drawings already referred to, which serve to illustrate our said invention more fully, Figure 1 is a front view of our combined lock and latch and its keeper. back view of the same. Fig. 3 is a similar View with the back plate removed and showing the latch in an open position. Fig.4is a like View illustrating the latch in a locked position. Fig. 5 is an end view of the combined lock and latch and its keeper. Fig. 6 is a transverse sectional view in line a: a: of Fig. 4. Fig. 7 is a back view of the lock and latch slightly modified.

Like parts are designated by corresponding letters of. reference in all the figures,

.The object of our present invention is the production of a very simple and eflicient combined lock and latch. To attain this result, we construct this combined lock and latch of a case A, preferably of rectangular shape and having perforated lugs a a, by means of which the lock is secured to a do0r,.not shown. This casing has in about its center and projecting from the inner side of its face plate A a stud B, upon which is pivoteda bolt 0. This bolt has at its rear end anarr'ow portion 0', forming the short arm of said bolt, while its opposite or long arm, being the one proj ectingjhrough an opening a", in one end of the casing A, is curved as shown at c. It also has one corner slightly rounded, as shown at c, the object of which will hereinafter more I fully appear. From the front side of the face Fig. 2 is a.

plate there are projecting two lugs D D, to

which is pivoted a U-Shapedhandle E, by

means of pivots, bolts, screws or similar fastoning e e, passing through the heads E E of said handle E and through the said lugs D D. Directly adjoining the lug D there is a slot-hole d, in the face plate which is covered by a slide F, of substantially I-shape. This slide has projecting from its back and passing through the Slot-hole at two studs ff, placed sufficiently far apart to admit the narrow end of the bolt 0 between them. Upon the face of this slide F there are located several projecting teeth f forming a rack, and so designated hereinafter, wherewith engage similar teeth 6'', Fig. 6, formed on the head E of the handle E, and which teeth form a portion of a pinion and will hereinafter be termed the pinion. This pinion and rack move the slide F when the handle E is actuated, and the slide, inturn, operates the bolt 0 by partly rotating it around its'pivot B.

In the face plate A there is a key-hole b; and projecting from its inner side there is a further stud g, upon which is pivoted a bellcrank G, the longer arm G of which when in g a perpendicular position, as shown in Fig. 4,

bears against the bolt 0 and thereby prevents the same from being rotated upon its stud B, while when said bell-crank G is moved by the bit h of the key Hinto the position shown in Figs. 3 and 7, said bolt is free to move, a recess c, in the bolt allowing it to pass said long arm G. The movement of this long arm G in one direction is limited by a stop g projecting from the inner Side of the face plate, and in the opposite direction by the short arm G coming in contact with a stop g which latter stop is provided with a screwthreaded hole 7:, for the reception of one of the screws II, Fig. 2, wherewith the back plate I is fastened to the casing.

The bell-crank G is considerably thinner than the bolt 0 so as to afford room fora coil spring j, Figs. 3 and 4, placed upon the stud g and interposed between the said bell-crank- G and the back plate I, to keep the bell crank against the inner side of the face plate A. Adjoining the stop 9 there is a double in cline is, over which the long arm G of the bell crank G-moves and which, in conjunc tion with the action of the coil spring j, gives the desired snap to the movement of said bell-crank when actuated by the key H and also retains the said bell crank in one or the other of the two positions shown respectively in Figs. 3 and 4.

In the casing A there are twoprojections m m, between which is held a curved blade spring M, the free end of which bears against the stud f and through it and the slide F, upon the bolt 0 and handle E in such manner as to keep them normallyin the position shown in Figs. 1, 2, 4:, 5 and 6, that is to say: in a horizontal position.

It will now be observed that bylifting thehandle E, (the bell crank G being in the position shown in Fig. 3 and disengaging the r l bination, with a suitable case having the lugs 8 5 bolt (3,). the pinion e engaging the rack f will move the slide F downwardly and the studsff on the back of the slide will move the short arm ofthe bolt with it and its long arm upwardly, thus disengaging the said bolt from its keeper J and allowing the door to which: the lock maybe attached to be opened, while if the door be closed, the bolt 0 will move upon the inclined of said keeper and as soon as it has passed the apex will drop (by the action of the blade spring M,) into the notch J If now the key H be turned from the position shown in Fig. 3 in the direction indicated by the arrow shown on the bit It Fig. 4:, the bell-crank will be moved into the position shown in Fig. 4, and thus lock the bolt in its horizontal position. It will be further observed that the entire mechanism-ofthis combined lock and latch isextremely simple and inexpensive, all the parts being capable of being readily produced in the process ofcasting in brass, bronze, or iron, and assembled without much hand or machine labor. d 7

The combined lock and latch is especially adapted for use upon refrigerators, but it is also capable of being employed on cupboards and in various other structures, without change or modification.

Wehave heretofore stated that the end of the bolt 0 is curved at c. This curvature, which, however, may be a bevel, if desired, as-

sists the bolt in ascending the incline J of the keeper J, while the rounded corner 0 assists the said bolt in passing into the notch J".

The slide F is longer than the slot-holed in the face plate A so as to fully cover the same and thereby prevent the introduction of dirt or other foreign bodies into the casing A, which would interfere with the operation of the locking mechanism.

By actuating the bolt G by the rack and pinion mechanism we are enabled to forcibly pass the said bolt into the notch J of the keeper, an advantage which cannot be obtained by the action of the spring M alone.

The outer faces of the casing and its keeper may be plain or ornamented in various mau- I ners without interfering with the action of its mechanism.

We have heretofore described the slide F as being provided with two studs f f engaging the short arm 0 of the bolt 0. This, however, may be modified as shown in Figs. 2 and 7 by slotting the short arm G" at f and by providing but one studfon the slide "F, said stud f engaging the slot f in the .manner shown. This modification requires the spring M to act directly upon the short arm 0' of the bolt 0 but does not otherwise change the construction of the lock, and is .one of several equivalents of the device described.

Having thus fully described our invention, Ii we claim as new and desire to secure to us i by Letters Patent of the United States-- 1. In a combined lock and latch, the com- D D projecting from its face; of a U sh aped handle pivoted to said lugs; a pinion on: the said handle,aslide havingon its face a rack engaging said pinion, and on its back a stud, ea pivoted bolt having a slottedaperture on 5 and a suitable keeper, as and for the object stated. p

2. In a combined lock and latch, the 001m 3 bination, With the casing havingthe lugs pro jecting from its face-plate,-of a U -shaped handle having the pinion on one of its heads; a ;slide uponsaid face-plate havin gja rack en- 5 gaging said pinion and studs projecting from 5 its back; and a pivoted bolt theshort arm of ,and for the purpose stated' d 3. Ina combined lock and latch, the combination,.with the casing having the lugspro l jecting firom'its face-plate, of a U shaped hairdle having. a pinion on one of itsheads; a sl ideupon the face-plate and havingarack engaging said pinion and studs projecting from its back through a slot-hole in thefaceplate; a pivoted bolt the short arm of which passes between the studs on the'slide, and the 5 long arm of which projects from the casing and engages a keeper, and locking mechanism for the bolt consisting of a bell crank, the spiral spring, the limiting stops and the 1; double incline, as and for the purpose stated. t. In a combined lock and latch, the coin"- bination, with: a suitable casing, of a pivoted .bolt actuated by a handle, as described,1of locking mechanism for the said boltconsistl ing of the pivoted bell-crank the spiral spring upon the pivot of the bell-crank,.the stops limiting the movementof thebell cranlqand the double incline, as and for the use and purpose specified.

In testimony that weclaim the foregoing as our invention we have hereunto set our hands in the presence of two subscribing witnesses.

EUGENE M. MIX. JAMES E.

Attest: H

F. G. HUSTED,

O. F. SWIFT.

its short arm engaging the stud on the slide,

. which engages the said studs on the slideas 

